how does gravity keep thing stuck to the floor? why does it do that and how deos it do that?

Question: how does gravity keep thing stuck to the floor? why does it do that and how deos it do that?
- Keywords:
  earth,
  gravity,
  physics
Asked by juneoct2233 to Ed, Hayley, Jason, Nathan, Sophie on 20 Mar 2013.
- Jason King answered on 20 Mar 2013:
  
  Gravity is the force that all objects exert on each other. The bigger the object the more gravity it has, but the further away you are, the weaker it feels. The earth is really big and heavy, so everything nearby (like on it’s surface) is pulled towards it. So tables stay on the floor. We still don’t really understand exactly how gravity works though, or why objects pull towards each other, but it’s obviously really important and has kept lots of very clever physicists busy for a long time.

Question: how does gravity keep thing stuck to the floor? why does it do that and how deos it do that?